The chrome(II) complex [CrII(H2O)3µNH(CH2PO3H)3] is synthesized and studied. The crystals are monoclinic, space group P21/c, Z = 4, a = 9.28230(10), b = 16.0778(2), c = 9.79790(10) Å, β = 116.081(2)° (CIF file CCDC 1045098). The chrome atom is coordinated at the vertices of the distorted octahedron by three atoms of the water molecules and three O atoms of two tridentate chelate-bridging ligands NH(CH2PO3H)3 (L = H4NTP2–). The compound is a linear polymer. The eight-membered cycle Cr–O–P–C–N–C–P–O is closed upon the coordination of ligand L by two oxygen atoms (O(1), O(6)). The O(5) atom is bound to the adjacent chrome atom. The stabilization of the oxidation state of Cr(II) is due to the delocalization of the electron density drawn aside from the metal atom in the PO3 groups.
Russian Journal of Coordination Chemistry – Springer Journals
Published: Oct 11, 2015
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